expedient adj. 应急有效的

It's highly expedient for you to use despatch, lest another should step in.
你最好是赶快，否则别人会插进来。

flunk vt. & vi. 通不过(考试等)；不及格

If you don't get on the ball and start studying harder, you're going to flunk.
如果你不积极进取，更加努力学习，你就会考不及格的。

fallacious adj. 谬误的；虚妄的

an argument that appears good at first view but is really fallacious
初看有效实际谬误的论证

extoll vt.赞美

The teacher was extolling her work to the skies.
教师极力称赞她功课好.

finesse n. 手腕，手段，技巧

Social finesse, willingness to relocate and language capacity are also determinant factora in assessing job qualifications.
社交手腕、愿意调动以及语言能力也是评估工作效绩的决定性因素。